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Omnivore

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An animal that can use both plants and other animals as food sources.

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Tertiary Consumer

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A consumer that feeds on both primary and secondary consumers.

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Groundwater

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Precipitation that seeps into the soil and collects in an underground reservoir.

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Surface Runoff

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Precipitation that falls on land and flows over land surfaces into streams, rivers, lakes, wetlands, and the ocean.

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Aquifer

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Porous, water-saturated layers of sand, gravel, or bedrock in which groundwater collects.

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Carnivore

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An animal that primarily feeds on other animals.

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Herbivore

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An animal that primarily feeds on plants.

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Detritivore

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An organism that feeds on dead organic material, especially plant detritus.

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Producer

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An organism, typically a plant or algae, that can produce its own food through photosynthesis.

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Hydrologic Cycle

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The continuous movement of water on, above, and below the surface of the Earth.